Does sound work in Synfig?

I am running 1.4.0 of Synfig which has a speaker icon near the timeline and allows me to attach a .flac file to my animation. Visually, this Synfig feature seems to work fine. However, when I render, my mp4 or avi have no sound. When I search this forum about it, I see a lot of replies stating that Synfig does not support audio. However, these replies are many years old, and I’m not sure they still apply. Should the sound feature work? Or is it 90% complete, but without the final piece of the puzzle in place?

https://forums.synfig.org/latest -> 12d ago :wink:
Rendered Video No Sound